Weighing-scale.



c; .BARnETnfor NEW `YORK, N,Y.,` AssiG'Nonfro' MEMCA mwN .A conronarron orrmw You wmenme-scnrn.

:a citizen lofthe "United States,- and resident of'N'eW, York .'c'ity',v|borough of Brooklyn, in,v

the; county of Kings and State' of New lYork,

`h laye i`nyentedl certain new and'fu'sefulwlm f provements in Weighing-Scales, of which the followinglisa'specification.A yInj weighing''scales employing flexible strips or bands .depending from fulcrum blocksto rnovably support' the Weights,

ySealeloearns andthe like,"fro1n which latter motion is' 'transn1itted to anf 'index ni'ernber,

i '.or pointer', particles oft-lira?. chips andv anal- Ogous` foreign substances .that mayV cellectV i between the 'ulcru'nr block fand' thel strip or i 4l'gan'dfare liabletocause a-yariation in the f normal operation vof the indexior pointer, or

in .other Wordsfto cause the indeXlor pointer -tcindicatefor' register v.the Weight inaccu- .g rately atene, orfmore olf'I its"-,positionsdter -mine'dibyfthe point. of interposition of; -suchl dex i 'r'ip'ointen' andi-.o this end proyidethe 2 'ulc"um`.block or 'strip support, at'the part' upon .the edges offwhidh the aforesaid strip 'or band rests, and by preference 'the upper portions of said recesses or groovesopen' ``into a transverselyy disposed recess or .groove in tne ulcrinn block which is also beneath foreign vThe object of my invention isto'pro'vide simplerand eiicient means for preyentin-gor 4obyiating the-@aforesaid variations ofthe 1nbeneath the strip, withy recesses or. Grooves the flexible', strip, the ends of which' trans- Versejrece'ss or groove preferably openfreel'ybeyond the side edgesof the' liexible strip,

y and yby 'preference the edges of the inetalbe- A'tm'vee'nfthe lirs't named' recesses 'are madev j sharp.'- gByfthis means, if dustgchips andl y eiher like vrelatively small foreign' substances oh4 particles lodge upon lthe fulcrurn block beneath such leiriblestrip, such foreign snbcrurn blocln'or be forced therein bythe flexible strip, o r will be cut by 'the latter at the sharp edgesof such recesses, thereby per-` l `lnittingthe' flexible-,strip toat all times bear 'properly upon the fulcrurn block` and' obviate .or

substancisjbetvyeenfthe strip andthe stances .'will -all into the recesses of the furl?- revent fthe unequalv resting of.` the flexible' strip'fupon, .the fulcrumy block,

y sbec'ication of Letrsrateati Patented Feb. 10, '191i Application ined my 4`, 1912.' serial N'ojssmo'z. y 'i Y(whichwould occur kwith the fulerm bl ')cks, as known toune, having'a sinloothbearing surface f for the'lexible strip), whereby .the

danger of inaccurate, registeringor indient ing is oyercome'. ry the class" of vW'eig'hing machines tre-.i ferred to, wherein 'the'index-orpointervis- 'rotated by inea- Ils of'rack 'andpiniendev'iceoperated byth'efnrnovernent -of the ,balance lyvelght or'arm', y (which is supponte'd'for rock-f lng b y 'the aforesaidlexible strip), .it is sornetnnes customary to. provide thefweig'ht or -its supporting arrn with af cam that co- .aets yvith. an arrnA connected With-,the rack, 'whereby When the vWeight swings, underthe influence o 'the article,beingjweighed,the

rack is'.foperatedI to` cause: .the prlper, rotationI the index or1 pointer, The 'sirfaeeofsuch cani, therefore'that coacts Withlhearm en tending .from the rack, must :be very ac u-' rat'ely fitted connection- With said arm, t0 cause.. the proper operation' 'offthe pointer at all; pointsof its rotation, an'dfslight van? atie-ns in' the :cam surface! or @slight v variav tions .of the pressure of the rack-ar1n.'11pon st ich earn are liable Joo -c'ause undesirable Va# riation's 1n the 'action of 'thefindex or pointen v ','An object of my inventionis'to rovide Inea'ns yfor reg-:ilatingthe action of t 1e rack arinin connection with such vcam, as," for instance, tol, ala`nc'e, y or 'controlabe ypres- `sure 'or- 4Weight" fo'f the rack-arm upon' the..ca1n lin-Varyingpositions of they late terv Withfrespect' `to said arm.. To this yendl vconnect with the rack :1n-adjustable c'ounter'pois'e--or Weight,. ha\ing" proper rela-v tionftothe rack and `its arm thatcoacts with thecams,f whereby, by' adjusting lsaid coun-` Aterpoise or Weightfwith v respect to. the pivotal i supportjofthe rack and its lannu-'the pressure lor Weight of the'- latter upon7 the cam may be regulated insuch manner -as to overcome variablemovement Of-theindex or polnten by the cam and rackthat might otherwise" occur.4 'Y 'c 'My invention also' comprisesnovel details offim'provelnent' and combinations o Iparts'that'will be .rhoiefully hereinafter set forth and then pointed out in the claims.

1 Referencei's to be hadto-the accon'lpanying drawings forming part hereof, wherein` 'Figure lis an elevation, partly in section,

of a weighing-scale index or pointer-operating mechanism embodying my invention; Fig. 2 is a plan view of the fulcrum block or support for the flexible strip that supports the balance weight, and Fig. 3 is a detail end view of the fulcrum bar iii its support. i

The numeral 1 indicates a port-ion of the frame of a wei hing scale mechanism which may be of suitable construction. 2 indicates a shaft carrying a pointer 3, and 4 a pinion meshing with a rack 5 pivotally sup-V orted at 5 upon frame 1, all of any wellown or desired construction. The arm 6, which may be weighted or provided with desired weights 6, is provided at opposite sides with bearing blocks 7 adapted to roll upon rollers 8 that are journalef1 upon pivots 9 at opposite ends of fulcrum block 10. One of the arms 6 has a 'cam 6c to co-act with aroller 5* pivoted on the arm 5c of rack 5. The fulcrum block 10 is supported in frame l in any suitable manner, as by resting in suitableseats 1a in saidframe 'fand retained firmly in position by screws 11 passing through the fulcruin block and meshing in threads in suitable recesses 1b in frame 1. The arms 6 are shown provided with curved end portions 6b around which flexible strips 12 pass, the upper ends of which are secured to arms 6 by clamping devices 13, 14, the lower ends of which strips are shown depending from the ends 6b of the arms 6, and connected with a suitable loop or the like 15 to which the weighing mechanism may be connected. The arms 6 an: movably supported by means of one or more iiexible strips 16 shown secured at their upper ends upon the fulcrum block bythe clamping bar 17 and screws 18, the lower ends of .said strips 16 being -shown secured to the arms'6 by clamping bar 19 and screws 20, whereby arms 6 are movably supported bythe flexible strips 16 to reck with respect to the fulcrum blocks on the corresponding rollers 8.

Theparts so far described are similar to well known weighing mechanisms, and in themselves form no part of my present invention.v With such devices, however, there isdanger that foreign substances or particles, such as dust, chips, etc. may lodge between the curved bearing surface 10a of the fulcriim block and the strip 16, which is liable to cause the required Aaccurate susension of arm 6 from the fulcrum block to be variable and thereby to vary or detract from the accuracy of the index member or pointer, because such foreign substance has the tendency to cause strip 16 to rise correspondingly on the fulcrum block, as the strip swings on the latter, thereby ydisarranging the relation of the associate arm 6 with respect to its normal position, having a resultant effect upon the index or pointer of producing inaccurate movement of the latter, at least with respect to the relationship between the latter in some point of its movement and such foreign substance. To obviate these objections I provide the bearing surface 10a of the fulcrum block with 'recesses or grooves 10b beneath strip 16, which recesses are shown extending from edge 10 upwardly in Jarallel relation along the surface of the ulcrum block upon which'the strip 16 bears. "The upper ends of the -re" cesses 10b are shown leading to a `transversely disposed recess or groove 10d shown extending laterally beyond the side edges of strip 16. The outer or peripheral edgesof the metal between the recesses or grooves 10b are shown made relatively sharp or pointed to reduce the surface for particles or foreign substances to rest upon, and serving to cut into or sever such particles or substances under the pressure of the strip 16 against the same. It will be thus understood that if undesired particles or foreign substances lodge upon the fulcrum block beneath the strip 16, they will either drop into the grooves or recess 10b, and thus not interfere with the proper bearing of strip 16 upon the fulcruni block, or will be cut away by the movement and pressure of the strip thereon, and such particles may fall away from the fulcrum block, and if they should tend to crowd ander strip 16 at the upper ends of grooves or recess 10b they will be received in the transverse groove or recess 10d, and thus work along and escape through the ends of the latter at the sides of strip 16.

My improvements are of great advantage,

since it has been ascertained in practical use of weighing machines of the class described, which are very delicate in. their operation,

.that the lodging of particles or foreign substances between the fulerumblock and the flexible strips, has the effect to cause such variation in the movable arm 6, from which the index or pointer is operated, as to cause inaccurate operation of the in dex or pointer, and that by keeping such particles or foreign substances from lodging between the flexible strip and its surface that bears upon the fulcrum block the proper operation o f the index or pointer is more accurately maintained.

Each fiilcrum block or bar may be provided with one or more strips 16 and grooves or recesses 10a, 10b, corresponding thereto. In the example of weighing machines illustrated two fulcrum blocks 10, two corresponding arms., 6, and two 4strips 12, each connected with-the loop 15,' are shown, but it will be understood that the number of such parts may be used according to the character of the weighing mechanism.. Cam 6c with the corresponding `arm 6 moves outwardly .mja-1 position. curat '1y l haped meer the* neuem fl y the farti-cie. being j weighed, and causes rack 5 through pinion 4 to .rotate the lindex or pointer 3 .correspond-4 -inglylg'and the outer portion 6"A of theV cam COI'rSpondingly moves arm 5 back to restore thep'olnter as arm 6 returnsjtoward the nor- \'l "he cam 6 must be very acin order that the, movement it im arts-'tothe' index or pointer Will-corre- ,SPUR a'urately', With the, article being lweighed, "and:v the weight of". arm 5 bearing upon c4 a'. `rn,6c 1s ,a factor 1n the accurate indication ofthe Weight of the article to such an extent that if arm 5c bears too heavilyuponl therack-arm'5l and [its resul in the 'cam 6"v it acts as .an undesired counter`. poise upon arm 6, and-likewisel if arm- 5c bears too lightly, in some positions, upon am 6%v t-ereis,l a reverse --ei'ect upenn the Weighted arm 6, in either-event resulting 'moreer less inaccurate indication; 'by lthe lindexlor pointer ofthe weight ofthe "article In order to enable thepropery balancing Iof' pressure upon camc, "I provid'e an adju ta 'le Weight 'or counterpoisecomiected with therack and so located relative to the axis of lrotation of the rack; that-by proper adjustment ofsaid' coun-'- terpoise- With'respect to the arc ofrotation of the'rack, as in an: areconcentricv therewith, or in Itle'same arc,the.vveight ofarm .c'bearing upon-"cam =6-may2 very accurately `deter-mined ,Wi'thfthe eiect ofI retaining.l such adjustment of the 'counterpoise constant 'as required.,l To this vend I have. shown an arml 211that isiconnected ith rack [5 'and 'providedfwith a yoke 2 E ca` tying athreadvl edrod or screwl22upo y-yvhich 'an iteriorly threaded counterp'ois'e or .weight 23' is' fitted for adjustment, a lockn'u't 24011 said screw ser-ving to retain 'the counterpoiseor weight 23 in set position. The screw, or threaded rod.22 is shown supported horizontally:above,l rack 5 and extending on opposite sides of the verticalI plane passing'throug'h'pivot 5, 4so thatcounterpoise or Weight QSVis-.adjustable laterally with respect to such plane. By the arrangement. set .forlth, -counterfpoise'` A or weight 23 may be adjusted to the right or left, respecting the vertical plane. throughA pivot 5, and thereby the weight or pressure` of arm 5 upon o r with respect to cam ,6 may be Vvery accurately determined, and whereby if in any position of arm 5c with resr'iect to cam 6, when the 'latter is moved by arm 6, i't is found thatthe pressure or Weight of arm 5c upon.' saidcam-is too great or .too light,"

' thenxby theproper'adjustm'ent of counter-4 While I havelillustrated improvements in connection vwith v'a lWell known classer type of' Weighingme'chaiism, it 'Will be un? der stoodthat my, invention is not limited-'for ,use with the particular detailsof cons-tru'ction.` of v Weighing mechanism set forth, :and .7 o'

that cl'xanges may be made,` within the scope of the appended.y claims,l Without departing from the .spirit of my 'invention'. z t' .Having lnow described my inventibnwhat- I'claim is:1-

- 1,; A 'weghingmechianism comprising a .'fulcrum block, an ,arm,'. and a tlexiblestrip connecting thefu'lcrum b'locl; with the arm, said -fulcrumbl'ock 'bein 'provided' in its upper surface with a recess extending longi- 8 0 tudin'ally of block beneath-said strip.

f ,2. A' Weighing-mechahismcomprising a. fulcrumjblock, an arm, vand .a'liexible strip 'connecting-the fulcrumjblk with the arm, saidjfulcrum block Abeing provided initsiupperfsurface lwith,'archess extending longitudinally-r-,Q Said block beneath said strip 'and extending beyond the side edges of-said- Strip# A 3.` .weighin`g mechanism comprising 'an 90 arm,,Ineanstuo Inovably. supp'ort the arm, an index, devices to.actuate`the.index, an ad-A justable vcounterpoise 'connected with said devices,.a nd al cam connectedjwith said ar'm to lactuate'fsaid devices', said counterpoise serviilig tofregulatc' pressure oi4 said devices lupon said "cam.

"" 4.1 Aweighing mechanism comprising an arm," means ,to movably support the arm, a

bam connected with saidwar'mf an index, .a 100 rack and pinionto operate the index, an arm Connected with 'the' v rack4N and' coperative with said cam,- and a -e'ount'erpoise connected with' said 'rack to regulate thepressure of v-said arm-upon said cam.'4 l n 5.- ]A Weighing mechanism comprising an.

arm, means ,to movably support,therarm', a camconnected with said arm, an' index, a. rack and pinion to operate the index, v an 4arm connected'with the rack' and c`operative1- 110l I with said-cam, and l aeounter oise connectedwith saidfrack to regulate he 'pressure ofsaid arm upcnsaid cam, said .counterpoise being'adjustably connected -Withthe ,rack to .move transversely with respect t a plane passin'glupwardly 'through the axis, of the rack.,v

Azweighing mechanism .com rising an 'arn1 ,'mea.ns to-movably v'support t e `a rm,-a

cam connected with said arm, an index, 'a ,12o rack .and-pinion to A'operate the-index, an arm connected ...wi`thithe rack and'co'pera-tive Withsaid Gann-said rack having van arm, a "screw" ca1iried by said arm, and a counter. .poise adjustable with respect to said screw v "IQAWeighingv mechanism-comprising an arm-, meansl :to movably support the; arm,f a

rpm;v arm 6tol causefthe 'more accuat @afina .by the inde; @fr wine-'fi em eerwedi=vifh-eidifare"en.indexe i rack and pinion to operate the index, an a'rm of NewYork, and State of New York, this. connected with the rack and coperative 3rd day of May, A. D. 1912. with said cam 'said rack havin@ an arm a i yoke carried by said arm, a SmjeiiT carried ,by JOSEPH C' BARRETT" 5 Said yoke, and a counterpoise mounted upon said screw.

Signed at NewYork city, .in the county .Witnesses T. F. BOURNE, MARIE F. W'AINRIGHT.' 

